Achnatherum hymenoides (Roem. & Schult.) Barkworth in Phytologia 74(1): 7-8. 1993 sec. Dávila & al. 2018
- ≡Stipa hymenoides Roem. & Schult., Syst. Veg. 2: 339. 1817 syn. sec. Dávila & al. 2006
- =Stipa membranacea Pursh, Fl. Amer. Sept. 2: 728. 1814 syn. sec. Dávila & al. 2006
- =Eriocoma cuspidata Nutt., Gen. N. Amer. Pl. 1: 40. 1818 syn. sec. Dávila & al. 2006
- =Milium cuspidatum (Nutt.) Spreng., Syst. Veg. 1: 251. 1825 syn. sec. Dávila & al. 2006
- =Fendleria rhynchelytroides Steud., Syn. Pl. Glumac. 1: 420. 1854 syn. sec. Dávila & al. 2006
- =Oryzopsis cuspidata (Nutt.) Benth. ex Vasey, Grass. U.S.: 23. 1883 syn. sec. Dávila & al. 2006
- =Oryzopsis membranacea (Pursh) Vasey in U.S.D.A. Div. Bot. Bull. 12(2): 10, t. 10. 1891 syn. sec. Dávila & al. 2006
- =Eriocoma membranacea (Pursh) Beal, Grass. N. Amer. 2: 232. 1896 syn. sec. Dávila & al. 2006
- =Oryzopsis hymenoides (Roem. & Schult.) Ricker ex Piper in Contr. U. S. Natl. Herb. 11: 109. 1906 syn. sec. Dávila & al. 2006
- =Eriocoma hymenoides (Roem. & Schult.) Rydb. in Bull. Torrey Bot. Club 39(3): 102. 1912 syn. sec. Dávila & al. 2006